Student Unit Guides are perfect for revision. Each guide is written by an examiner and explains the unit requirements. This guide offers advice on preparing for the Edexcel Unit 3 and Unit 6 Chemistry Laboratory Skills assessments. The Content Guidance section outlines what you may be asked to do in the internally assessed practicals. The four skills required for A-level practical chemistry are described. Practice examples and worked examples with examiner's comments will help you understand precisely what you have to learn, the skills required and the potential pitfalls. The Questions and Answers section provides examples of the types of experiments and questions that you will be given in Units 3 and 6. It also contains answers to these test questions and to the practice examples.